--- /dev/null
+#
+# NEPI, a framework to manage network experiments
+# Copyright (C) 2013 INRIA
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
+
+import base64
+import socket
+import vsys
+
+from optparse import OptionParser
+
+STOP_MSG = "STOP"
+
+def get_options():
+ usage = ("usage: %prog -N <vif-name> -D <delete> -S <socket-name>")
+
+ parser = OptionParser(usage = usage)
+
+ parser.add_option("-N", "--vif-name", dest="vif_name",
+ help = "The name of the virtual interface, or a "
+ "unique numeric identifier to name the interface "
+ "if GRE mode is used.",
+ type="str")
+
+ parser.add_option("-D", "--delete", dest="delete",
+ action="store_true",
+ default = False,
+ help="Removes virtual interface if GRE mode was used")
+
+ parser.add_option("-S", "--socket-name", dest="socket_name",
+ help = "Name for the unix socket used to interact with this process",
+ default = "tap.sock", type="str")
+
+ (options, args) = parser.parse_args()
+
+ return (options.vif_name, options.delete, options.socket_name)
+
+if __name__ == '__main__':
+
+ (vif_name, delete, socket_name) = get_options()
+
+ # If a socket name is sent, send the STOP message and wait for a reply
+ if socket_name:
+ sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+ sock.connect(socket_name)
+ encoded = base64.b64encode(STOP_MSG)
+ sock.send("%s\n" % encoded)
+ reply = sock.recv(1024)
+ reply = base64.b64decode(reply)
+ print reply
+
+ # Else, use the vsys interface to set the virtual interface down
+ elif vif_name:
+ vsys.vif_down(vif_name, delete = delete)
+
+